a trim vane mounted on the glacis plate. It is fully amphibious once this vane is raised, being propelled at speeds of up to 7 km by two water jets at the rear. A two-piece windscreen is provided for the driver and a passenger seated to his right. During combat, the windscreen may be covered by hinged armored shutters. Export models of the WZ-523 are offered with a variety of turreted armament options, including a 12.7mm machine gun and a one-man conical turret incorporating a single 7.62mm general-purpose machine gun to the right and a heavier armament of the customer's choice to the left. WZ-523s in Nigerien and Gabonese service have been re-engined with German Deutz BF6 diesel motors. Variants WZ-523 Armored Personnel Carrier armed with a 12.7 mm heavy machine gun. ZFB-91 Internal Security Vehicle based on the WZ-523. Operators : 60 in service, not including ZFB91 variant. : 10 : 20 : 3 : 58 delivered in 2009-2010; 4 ambulance version delivered in 2012 and 24 others in 2013. : 21; export model incorporating the BMP-1 turret. : 2 : produced under license as the Shareef 2. See also Vehicles of comparable role, performance, and era WZ551 Ratel EE-11 Urutu SIBMAS Pindad Anoa Berliet VXB-170 References Foss, Christopher F. Jane's Tanks and Combat Vehicles Recognition Guide. London: HarperCollins, 2002. . Amphibious armoured personnel carriers Armoured fighting vehicles of the People's Republic of China Internal security vehicles Wheeled armoured personnel carriers Six-wheeled vehicles Military equipment introduced in the 1980s